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Stupid question. Are you required to use a return line when using elec. fuel pump? It's a 67, 406 with an early model 650 vac speed Demon. Idling too rich makes your eyes water. Would a return line help? and where would you put it.
 

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It depends on your regulator. If it's a return style regulator you'll need the return line. It goes from the return port on the regulator to the fuel tank.
 

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What fuel pump are you running? Some, like the holley red/blue pumps, have an internal bypass. Others have a specific port on the pump to connect a line back to the tank. Are you running a regulator?
I run a mallory 140 with the return-style regulator. If you think about it, it keeps the fuel flowing in the line even when you're sitting still. G-forces are a b___h to a drag car!
 
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